The song is a moving first-person note that describes the days, weeks and years (now three years) after Morgan's son Jerry died. The "Redneck Yacht Club" hitmaker debuted it on Fox & Friends two weeks ago, but his old friend Shelton started to give it a major push on Twitter this week by first saying he'd give up his spot on the radio for the ballad.

WATCH: Craig Morgan Talks About His Son Jerry:

Over the next 48 hours the "God's Country" hitmaker urged his fans to download Morgan's song to get him to No. 1 on the rolling iTunes sales chart. He charted its progress and celebrated Thursday morning (Sept. 12) when it reached the top spot. He may not be done yet.

Shelton's girlfriend Gwen Stefani has retweeted most of his tweets and added a few of her own. DeGeneres also tweeted about the song and urged her 78 million followers to support Morgan, too.

The simplicity of Shelton's mission is what's remarkable. He just wants people to hear a song he believes in and believes others will benefit from. "The Father, My Son and the Holy Ghost" becomes a big vocal showcase by the end, but at its core, the song is one man's inspiring missive about life after losing a loved one. It's a relatable message that enough people have gotten behind to knock Lizzo out of the No. 1 spot, if only for a little while.